Ōnin (応仁?) was a Japanese era name (年号 nengō?, "year name") after Bunshō and before Bunmei. This period spanned the years from March 1467 through April 1469. The reigning emperor was Go-Tsuchimikado-tennō (後土御門天皇?).
The Ōnin War: This conflict began as a controversy over who should follow Ashikaga Yoshimasa as shogun after his retirement – whether it would be his brother (Yoshimi) or his son (Yoshihisa); but this succession dispute was merely a pretext for rival groups of daimyōs to fight in a struggle for military supremacy. In the end, there was no clearcut winner. The complex array of factional armies simply fought themselves into exhaustion.
The emperor honored Yoshimasa's villa with a special name – Higashiyama-dono. Construction begins on the Silver Pavilion, but the work is interrupted by a range of disruptions associated with the Ōnin War. Significant dates in this evolving crisis were: